单选题Blocking open or removing fire dampers can cause（）.Afixed foam systems to be ineffectiveBfaster cooling of the fireCthe accumulation of explosive gasesDthe fire to spread through the ventilation system
单选题
Blocking open or removing fire dampers can cause（）.
A
fixed foam systems to be ineffective
B
faster cooling of the fire
C
the accumulation of explosive gases
D
the fire to spread through the ventilation system
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